./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a479da07a0fc6d1ad250c3f67241d6294523a3c8fee4f6d465a7a5bdc9204f86 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:33:22,662 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:33:22,728 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:33:22,734 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:33:22,734 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:33:22,759 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:33:22,759 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:33:22,760 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:33:22,761 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:33:22,761 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:33:22,762 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:33:22,762 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:33:22,763 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:33:22,764 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:33:22,764 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:33:22,765 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:33:22,765 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:33:22,766 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:33:22,766 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:33:22,767 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:33:22,767 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:33:22,768 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:33:22,768 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:33:22,769 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:33:22,769 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:33:22,770 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:33:22,770 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:33:22,771 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:33:22,771 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:33:22,772 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:33:22,772 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:33:22,773 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:33:22,773 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:33:22,774 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:33:22,774 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:33:22,774 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:33:22,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:33:22,775 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:33:22,776 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:33:22,776 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:33:22,777 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:33:22,777 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:33:22,778 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a479da07a0fc6d1ad250c3f67241d6294523a3c8fee4f6d465a7a5bdc9204f86 [2023-11-29 05:33:22,998 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:33:23,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:33:23,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:33:23,021 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:33:23,021 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:33:23,023 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2023-11-29 05:33:25,822 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:33:25,992 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:33:25,993 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2023-11-29 05:33:26,000 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/data/cc6e62f78/970e30fa6f7044a79341d023b8be21f6/FLAG2cfb584cf [2023-11-29 05:33:26,016 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/data/cc6e62f78/970e30fa6f7044a79341d023b8be21f6 [2023-11-29 05:33:26,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:33:26,020 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:33:26,022 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:33:26,022 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:33:26,028 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:33:26,028 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:33:26" (1/1) ... [2023-11-29 05:33:26,029 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c058bec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:26, skipping insertion in model container [2023-11-29 05:33:26,030 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:33:26" (1/1) ... [2023-11-29 05:33:26,055 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:33:26,228 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2147,2160] [2023-11-29 05:33:26,233 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:33:26,242 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:33:26,263 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2147,2160] [2023-11-29 05:33:26,264 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:33:26,272 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:33:26,273 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 05:33:26,281 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:33:26,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:26 WrapperNode [2023-11-29 05:33:26,282 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:33:26,283 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:33:26,283 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:33:26,283 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:33:26,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:26" (1/1) ... [2023-11-29 05:33:26,299 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:26" (1/1) ... [2023-11-29 05:33:26,320 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2023-11-29 05:33:26,320 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:33:26,321 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:33:26,321 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:33:26,321 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:33:26,333 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:26" (1/1) ... [2023-11-29 05:33:26,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:26" (1/1) ... [2023-11-29 05:33:26,335 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:26" (1/1) ... [2023-11-29 05:33:26,351 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2023-11-29 05:33:26,351 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:26" (1/1) ... [2023-11-29 05:33:26,351 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:26" (1/1) ... [2023-11-29 05:33:26,357 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:26" (1/1) ... [2023-11-29 05:33:26,361 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:26" (1/1) ... [2023-11-29 05:33:26,362 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:26" (1/1) ... [2023-11-29 05:33:26,364 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:26" (1/1) ... [2023-11-29 05:33:26,366 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:33:26,367 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:33:26,368 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:33:26,368 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:33:26,368 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:26" (1/1) ... [2023-11-29 05:33:26,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:33:26,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:26,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:33:26,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:33:26,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:33:26,437 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:33:26,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:33:26,437 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:33:26,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:33:26,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:33:26,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 05:33:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 05:33:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:33:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:33:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:33:26,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 05:33:26,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 05:33:26,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 05:33:26,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:33:26,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:33:26,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:33:26,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:33:26,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 05:33:26,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:33:26,442 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 05:33:26,536 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:33:26,537 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:33:26,700 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:33:26,827 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:33:26,828 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 05:33:26,828 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:33:26 BoogieIcfgContainer [2023-11-29 05:33:26,828 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:33:26,832 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:33:26,832 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:33:26,835 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:33:26,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:33:26" (1/3) ... [2023-11-29 05:33:26,836 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e1c52e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:33:26, skipping insertion in model container [2023-11-29 05:33:26,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:26" (2/3) ... [2023-11-29 05:33:26,837 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e1c52e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:33:26, skipping insertion in model container [2023-11-29 05:33:26,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:33:26" (3/3) ... [2023-11-29 05:33:26,839 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2023-11-29 05:33:26,848 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-29 05:33:26,859 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:33:26,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:33:26,860 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:33:26,898 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 05:33:26,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 60 flow [2023-11-29 05:33:26,964 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-11-29 05:33:26,965 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 05:33:26,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-29 05:33:26,968 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 23 transitions, 60 flow [2023-11-29 05:33:26,971 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2023-11-29 05:33:26,982 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:33:26,990 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@22c8bd20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:33:26,990 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-29 05:33:27,001 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:33:27,002 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-11-29 05:33:27,002 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 05:33:27,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:33:27,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:27,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:33:27,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:27,010 INFO L85 PathProgramCache]: Analyzing trace with hash 954584566, now seen corresponding path program 1 times [2023-11-29 05:33:27,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:27,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914804279] [2023-11-29 05:33:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:27,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:27,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:27,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914804279] [2023-11-29 05:33:27,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914804279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:27,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:27,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:33:27,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408201416] [2023-11-29 05:33:27,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:27,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:33:27,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:27,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:33:27,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:33:27,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 05:33:27,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:27,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:27,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 05:33:27,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:33:27,585 INFO L124 PetriNetUnfolderBase]: 82/167 cut-off events. [2023-11-29 05:33:27,586 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-29 05:33:27,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 167 events. 82/167 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 523 event pairs, 30 based on Foata normal form. 6/172 useless extension candidates. Maximal degree in co-relation 270. Up to 99 conditions per place. [2023-11-29 05:33:27,590 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 21 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2023-11-29 05:33:27,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 135 flow [2023-11-29 05:33:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:33:27,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:33:27,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 44 transitions. [2023-11-29 05:33:27,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2023-11-29 05:33:27,603 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 44 transitions. [2023-11-29 05:33:27,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 44 transitions. [2023-11-29 05:33:27,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:33:27,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 44 transitions. [2023-11-29 05:33:27,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:27,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:27,611 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:27,613 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 52 flow. Second operand 3 states and 44 transitions. [2023-11-29 05:33:27,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 135 flow [2023-11-29 05:33:27,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 30 transitions, 121 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:33:27,618 INFO L231 Difference]: Finished difference. Result has 24 places, 21 transitions, 58 flow [2023-11-29 05:33:27,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=24, PETRI_TRANSITIONS=21} [2023-11-29 05:33:27,623 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2023-11-29 05:33:27,623 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 21 transitions, 58 flow [2023-11-29 05:33:27,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:27,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:33:27,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:27,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:33:27,625 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:33:27,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:27,625 INFO L85 PathProgramCache]: Analyzing trace with hash -653057610, now seen corresponding path program 1 times [2023-11-29 05:33:27,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:27,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828417632] [2023-11-29 05:33:27,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:27,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:27,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:27,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828417632] [2023-11-29 05:33:27,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828417632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:27,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:27,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:33:27,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793499564] [2023-11-29 05:33:27,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:27,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:33:27,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:27,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:33:27,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:33:27,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:33:27,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 21 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:27,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:27,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:33:27,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:33:27,963 INFO L124 PetriNetUnfolderBase]: 146/283 cut-off events. [2023-11-29 05:33:27,964 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-29 05:33:27,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 603 conditions, 283 events. 146/283 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1117 event pairs, 66 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 241. Up to 189 conditions per place. [2023-11-29 05:33:27,967 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 30 selfloop transitions, 7 changer transitions 3/43 dead transitions. [2023-11-29 05:33:27,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 43 transitions, 187 flow [2023-11-29 05:33:27,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:33:27,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:33:27,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2023-11-29 05:33:27,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304347826086957 [2023-11-29 05:33:27,969 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 61 transitions. [2023-11-29 05:33:27,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 61 transitions. [2023-11-29 05:33:27,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:33:27,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 61 transitions. [2023-11-29 05:33:27,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:27,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:27,973 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:27,973 INFO L175 Difference]: Start difference. First operand has 24 places, 21 transitions, 58 flow. Second operand 5 states and 61 transitions. [2023-11-29 05:33:27,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 43 transitions, 187 flow [2023-11-29 05:33:27,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 43 transitions, 185 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:33:27,976 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 108 flow [2023-11-29 05:33:27,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-11-29 05:33:27,977 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-11-29 05:33:27,977 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 108 flow [2023-11-29 05:33:27,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:27,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:33:27,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:27,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:33:27,978 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:33:27,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:27,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1678281516, now seen corresponding path program 2 times [2023-11-29 05:33:27,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:27,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635471274] [2023-11-29 05:33:27,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:27,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:28,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:28,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635471274] [2023-11-29 05:33:28,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635471274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:28,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:28,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:33:28,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223936791] [2023-11-29 05:33:28,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:28,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:33:28,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:28,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:33:28,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:33:28,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:33:28,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 108 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:28,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:28,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:33:28,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:33:28,325 INFO L124 PetriNetUnfolderBase]: 166/316 cut-off events. [2023-11-29 05:33:28,325 INFO L125 PetriNetUnfolderBase]: For 166/166 co-relation queries the response was YES. [2023-11-29 05:33:28,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 316 events. 166/316 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1287 event pairs, 4 based on Foata normal form. 10/324 useless extension candidates. Maximal degree in co-relation 387. Up to 134 conditions per place. [2023-11-29 05:33:28,331 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 47 selfloop transitions, 13 changer transitions 1/64 dead transitions. [2023-11-29 05:33:28,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 64 transitions, 358 flow [2023-11-29 05:33:28,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:33:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 05:33:28,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2023-11-29 05:33:28,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341614906832298 [2023-11-29 05:33:28,334 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 86 transitions. [2023-11-29 05:33:28,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 86 transitions. [2023-11-29 05:33:28,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:33:28,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 86 transitions. [2023-11-29 05:33:28,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:28,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:28,337 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:28,337 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 108 flow. Second operand 7 states and 86 transitions. [2023-11-29 05:33:28,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 64 transitions, 358 flow [2023-11-29 05:33:28,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 64 transitions, 356 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-29 05:33:28,343 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 214 flow [2023-11-29 05:33:28,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=214, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2023-11-29 05:33:28,344 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 17 predicate places. [2023-11-29 05:33:28,344 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 214 flow [2023-11-29 05:33:28,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:28,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:33:28,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:28,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:33:28,345 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:33:28,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:28,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1893552388, now seen corresponding path program 3 times [2023-11-29 05:33:28,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:28,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574765567] [2023-11-29 05:33:28,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:28,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:28,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:28,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574765567] [2023-11-29 05:33:28,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574765567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:28,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:28,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:33:28,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042536538] [2023-11-29 05:33:28,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:28,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:33:28,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:28,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:33:28,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:33:28,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:33:28,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:28,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:28,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:33:28,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:33:28,613 INFO L124 PetriNetUnfolderBase]: 219/416 cut-off events. [2023-11-29 05:33:28,614 INFO L125 PetriNetUnfolderBase]: For 742/742 co-relation queries the response was YES. [2023-11-29 05:33:28,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495 conditions, 416 events. 219/416 cut-off events. For 742/742 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1682 event pairs, 69 based on Foata normal form. 6/417 useless extension candidates. Maximal degree in co-relation 995. Up to 179 conditions per place. [2023-11-29 05:33:28,620 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 44 selfloop transitions, 10 changer transitions 2/59 dead transitions. [2023-11-29 05:33:28,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 443 flow [2023-11-29 05:33:28,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:33:28,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:33:28,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2023-11-29 05:33:28,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2023-11-29 05:33:28,622 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 60 transitions. [2023-11-29 05:33:28,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 60 transitions. [2023-11-29 05:33:28,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:33:28,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 60 transitions. [2023-11-29 05:33:28,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:28,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:28,624 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:28,624 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 214 flow. Second operand 5 states and 60 transitions. [2023-11-29 05:33:28,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 443 flow [2023-11-29 05:33:28,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 443 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 05:33:28,632 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 270 flow [2023-11-29 05:33:28,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-11-29 05:33:28,633 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 24 predicate places. [2023-11-29 05:33:28,633 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 270 flow [2023-11-29 05:33:28,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:28,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:33:28,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:28,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 05:33:28,634 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:33:28,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:28,635 INFO L85 PathProgramCache]: Analyzing trace with hash -588269998, now seen corresponding path program 4 times [2023-11-29 05:33:28,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:28,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245476325] [2023-11-29 05:33:28,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:28,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:28,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:28,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245476325] [2023-11-29 05:33:28,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245476325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:28,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759856792] [2023-11-29 05:33:28,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:33:28,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:28,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:28,772 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:28,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:33:28,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:33:28,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:33:28,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:33:28,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:28,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:29,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759856792] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:29,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:29,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2023-11-29 05:33:29,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82206222] [2023-11-29 05:33:29,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:29,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:33:29,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:29,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:33:29,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:33:29,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:33:29,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 270 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:29,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:29,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:33:29,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:33:29,319 INFO L124 PetriNetUnfolderBase]: 323/608 cut-off events. [2023-11-29 05:33:29,319 INFO L125 PetriNetUnfolderBase]: For 1503/1503 co-relation queries the response was YES. [2023-11-29 05:33:29,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2345 conditions, 608 events. 323/608 cut-off events. For 1503/1503 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2843 event pairs, 33 based on Foata normal form. 10/610 useless extension candidates. Maximal degree in co-relation 1653. Up to 169 conditions per place. [2023-11-29 05:33:29,328 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 53 selfloop transitions, 35 changer transitions 2/93 dead transitions. [2023-11-29 05:33:29,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 93 transitions, 759 flow [2023-11-29 05:33:29,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:33:29,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:33:29,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2023-11-29 05:33:29,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173913043478261 [2023-11-29 05:33:29,330 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 119 transitions. [2023-11-29 05:33:29,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 119 transitions. [2023-11-29 05:33:29,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:33:29,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 119 transitions. [2023-11-29 05:33:29,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:29,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 23.0) internal successors, (253), 11 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:29,333 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 23.0) internal successors, (253), 11 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:29,333 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 270 flow. Second operand 10 states and 119 transitions. [2023-11-29 05:33:29,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 93 transitions, 759 flow [2023-11-29 05:33:29,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 93 transitions, 735 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-29 05:33:29,341 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 522 flow [2023-11-29 05:33:29,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=522, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-11-29 05:33:29,342 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 36 predicate places. [2023-11-29 05:33:29,342 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 522 flow [2023-11-29 05:33:29,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:29,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:33:29,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:29,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:33:29,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:29,544 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:33:29,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:29,545 INFO L85 PathProgramCache]: Analyzing trace with hash -863995678, now seen corresponding path program 5 times [2023-11-29 05:33:29,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:29,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501383279] [2023-11-29 05:33:29,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:29,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:29,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:29,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501383279] [2023-11-29 05:33:29,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501383279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:29,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:29,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:33:29,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673780399] [2023-11-29 05:33:29,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:29,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:33:29,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:29,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:33:29,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:33:29,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:33:29,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 522 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:29,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:29,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:33:29,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:33:29,834 INFO L124 PetriNetUnfolderBase]: 322/605 cut-off events. [2023-11-29 05:33:29,834 INFO L125 PetriNetUnfolderBase]: For 3129/3129 co-relation queries the response was YES. [2023-11-29 05:33:29,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2843 conditions, 605 events. 322/605 cut-off events. For 3129/3129 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2761 event pairs, 97 based on Foata normal form. 2/602 useless extension candidates. Maximal degree in co-relation 2137. Up to 319 conditions per place. [2023-11-29 05:33:29,843 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 49 selfloop transitions, 20 changer transitions 1/73 dead transitions. [2023-11-29 05:33:29,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 73 transitions, 799 flow [2023-11-29 05:33:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:33:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:33:29,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2023-11-29 05:33:29,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2023-11-29 05:33:29,844 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 60 transitions. [2023-11-29 05:33:29,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 60 transitions. [2023-11-29 05:33:29,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:33:29,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 60 transitions. [2023-11-29 05:33:29,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:29,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:29,846 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:29,846 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 522 flow. Second operand 5 states and 60 transitions. [2023-11-29 05:33:29,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 73 transitions, 799 flow [2023-11-29 05:33:29,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 73 transitions, 719 flow, removed 31 selfloop flow, removed 3 redundant places. [2023-11-29 05:33:29,859 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 555 flow [2023-11-29 05:33:29,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=555, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2023-11-29 05:33:29,860 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 38 predicate places. [2023-11-29 05:33:29,860 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 555 flow [2023-11-29 05:33:29,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:29,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:33:29,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:29,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 05:33:29,860 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:33:29,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:29,861 INFO L85 PathProgramCache]: Analyzing trace with hash -2113758336, now seen corresponding path program 6 times [2023-11-29 05:33:29,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:29,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935179843] [2023-11-29 05:33:29,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:29,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:29,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:29,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935179843] [2023-11-29 05:33:29,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935179843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:29,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:29,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:33:29,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130923143] [2023-11-29 05:33:29,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:29,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:33:29,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:29,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:33:29,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:33:29,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:33:29,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 555 flow. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:29,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:29,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:33:29,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:33:30,164 INFO L124 PetriNetUnfolderBase]: 323/597 cut-off events. [2023-11-29 05:33:30,164 INFO L125 PetriNetUnfolderBase]: For 3181/3181 co-relation queries the response was YES. [2023-11-29 05:33:30,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2784 conditions, 597 events. 323/597 cut-off events. For 3181/3181 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2643 event pairs, 101 based on Foata normal form. 8/600 useless extension candidates. Maximal degree in co-relation 2173. Up to 300 conditions per place. [2023-11-29 05:33:30,173 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 48 selfloop transitions, 26 changer transitions 0/77 dead transitions. [2023-11-29 05:33:30,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 77 transitions, 796 flow [2023-11-29 05:33:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:33:30,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:33:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2023-11-29 05:33:30,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072463768115942 [2023-11-29 05:33:30,175 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 70 transitions. [2023-11-29 05:33:30,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 70 transitions. [2023-11-29 05:33:30,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:33:30,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 70 transitions. [2023-11-29 05:33:30,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:30,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:30,177 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:30,177 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 555 flow. Second operand 6 states and 70 transitions. [2023-11-29 05:33:30,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 77 transitions, 796 flow [2023-11-29 05:33:30,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 750 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-11-29 05:33:30,199 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 585 flow [2023-11-29 05:33:30,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=585, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2023-11-29 05:33:30,200 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 39 predicate places. [2023-11-29 05:33:30,200 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 585 flow [2023-11-29 05:33:30,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:30,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:33:30,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:30,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 05:33:30,201 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:33:30,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:30,201 INFO L85 PathProgramCache]: Analyzing trace with hash -2100107881, now seen corresponding path program 1 times [2023-11-29 05:33:30,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:30,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884128419] [2023-11-29 05:33:30,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:30,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:30,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:30,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884128419] [2023-11-29 05:33:30,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884128419] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:30,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418418603] [2023-11-29 05:33:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:30,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:30,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:30,316 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:30,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:33:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:30,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:33:30,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:33:30,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:33:30,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418418603] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:30,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:30,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-11-29 05:33:30,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936324776] [2023-11-29 05:33:30,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:30,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:33:30,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:30,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:33:30,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:33:30,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 05:33:30,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 585 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:30,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:30,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 05:33:30,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:33:30,736 INFO L124 PetriNetUnfolderBase]: 494/986 cut-off events. [2023-11-29 05:33:30,736 INFO L125 PetriNetUnfolderBase]: For 4996/5038 co-relation queries the response was YES. [2023-11-29 05:33:30,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4429 conditions, 986 events. 494/986 cut-off events. For 4996/5038 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5252 event pairs, 86 based on Foata normal form. 15/995 useless extension candidates. Maximal degree in co-relation 2546. Up to 395 conditions per place. [2023-11-29 05:33:30,752 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 74 selfloop transitions, 5 changer transitions 7/103 dead transitions. [2023-11-29 05:33:30,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 103 transitions, 1104 flow [2023-11-29 05:33:30,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:33:30,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:33:30,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2023-11-29 05:33:30,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7065217391304348 [2023-11-29 05:33:30,753 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 65 transitions. [2023-11-29 05:33:30,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 65 transitions. [2023-11-29 05:33:30,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:33:30,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 65 transitions. [2023-11-29 05:33:30,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:30,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:30,754 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:30,755 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 585 flow. Second operand 4 states and 65 transitions. [2023-11-29 05:33:30,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 103 transitions, 1104 flow [2023-11-29 05:33:30,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 103 transitions, 1043 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-29 05:33:30,775 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 581 flow [2023-11-29 05:33:30,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=581, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2023-11-29 05:33:30,776 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 41 predicate places. [2023-11-29 05:33:30,776 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 581 flow [2023-11-29 05:33:30,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:30,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:33:30,776 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:30,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 05:33:30,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:30,980 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:33:30,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:30,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2099268387, now seen corresponding path program 2 times [2023-11-29 05:33:30,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:30,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669075377] [2023-11-29 05:33:30,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:30,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:31,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:31,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669075377] [2023-11-29 05:33:31,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669075377] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:31,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572640807] [2023-11-29 05:33:31,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:33:31,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:31,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:31,192 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:31,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:33:31,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:33:31,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:33:31,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:33:31,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:31,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:31,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572640807] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:31,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:31,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 05:33:31,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303228558] [2023-11-29 05:33:31,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:31,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:33:31,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:31,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:33:31,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:33:31,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:33:31,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 581 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:31,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:31,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:33:31,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:33:32,647 INFO L124 PetriNetUnfolderBase]: 1176/2028 cut-off events. [2023-11-29 05:33:32,647 INFO L125 PetriNetUnfolderBase]: For 9674/9698 co-relation queries the response was YES. [2023-11-29 05:33:32,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9830 conditions, 2028 events. 1176/2028 cut-off events. For 9674/9698 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10239 event pairs, 70 based on Foata normal form. 22/2048 useless extension candidates. Maximal degree in co-relation 5874. Up to 671 conditions per place. [2023-11-29 05:33:32,673 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 123 selfloop transitions, 87 changer transitions 7/222 dead transitions. [2023-11-29 05:33:32,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 222 transitions, 2353 flow [2023-11-29 05:33:32,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 05:33:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 05:33:32,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 233 transitions. [2023-11-29 05:33:32,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4824016563146998 [2023-11-29 05:33:32,675 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 233 transitions. [2023-11-29 05:33:32,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 233 transitions. [2023-11-29 05:33:32,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:33:32,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 233 transitions. [2023-11-29 05:33:32,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 11.095238095238095) internal successors, (233), 21 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:32,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 23.0) internal successors, (506), 22 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:32,679 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 23.0) internal successors, (506), 22 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:32,679 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 581 flow. Second operand 21 states and 233 transitions. [2023-11-29 05:33:32,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 222 transitions, 2353 flow [2023-11-29 05:33:32,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 222 transitions, 2321 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-11-29 05:33:32,696 INFO L231 Difference]: Finished difference. Result has 95 places, 127 transitions, 1477 flow [2023-11-29 05:33:32,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1477, PETRI_PLACES=95, PETRI_TRANSITIONS=127} [2023-11-29 05:33:32,698 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 70 predicate places. [2023-11-29 05:33:32,698 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 127 transitions, 1477 flow [2023-11-29 05:33:32,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:32,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:33:32,699 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:32,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:33:32,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 05:33:32,900 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:33:32,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:32,901 INFO L85 PathProgramCache]: Analyzing trace with hash 209099007, now seen corresponding path program 3 times [2023-11-29 05:33:32,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:32,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524431367] [2023-11-29 05:33:32,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:32,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:33,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:33,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524431367] [2023-11-29 05:33:33,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524431367] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:33,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970292126] [2023-11-29 05:33:33,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:33:33,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:33,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:33,079 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:33,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:33:33,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:33:33,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:33:33,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:33:33,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:33,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:33,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970292126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:33,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:33,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 05:33:33,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788515004] [2023-11-29 05:33:33,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:33,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:33:33,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:33,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:33:33,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:33:33,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:33:33,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 127 transitions, 1477 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:33,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:33,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:33:33,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:33:34,170 INFO L124 PetriNetUnfolderBase]: 1266/2190 cut-off events. [2023-11-29 05:33:34,170 INFO L125 PetriNetUnfolderBase]: For 23337/23365 co-relation queries the response was YES. [2023-11-29 05:33:34,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12909 conditions, 2190 events. 1266/2190 cut-off events. For 23337/23365 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11476 event pairs, 176 based on Foata normal form. 28/2210 useless extension candidates. Maximal degree in co-relation 8596. Up to 973 conditions per place. [2023-11-29 05:33:34,202 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 125 selfloop transitions, 75 changer transitions 11/216 dead transitions. [2023-11-29 05:33:34,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 216 transitions, 2849 flow [2023-11-29 05:33:34,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:33:34,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 05:33:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 157 transitions. [2023-11-29 05:33:34,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45507246376811594 [2023-11-29 05:33:34,204 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 157 transitions. [2023-11-29 05:33:34,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 157 transitions. [2023-11-29 05:33:34,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:33:34,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 157 transitions. [2023-11-29 05:33:34,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 10.466666666666667) internal successors, (157), 15 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:34,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 23.0) internal successors, (368), 16 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:34,207 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 23.0) internal successors, (368), 16 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:34,207 INFO L175 Difference]: Start difference. First operand has 95 places, 127 transitions, 1477 flow. Second operand 15 states and 157 transitions. [2023-11-29 05:33:34,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 216 transitions, 2849 flow [2023-11-29 05:33:34,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 216 transitions, 2507 flow, removed 154 selfloop flow, removed 3 redundant places. [2023-11-29 05:33:34,268 INFO L231 Difference]: Finished difference. Result has 116 places, 152 transitions, 1829 flow [2023-11-29 05:33:34,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1829, PETRI_PLACES=116, PETRI_TRANSITIONS=152} [2023-11-29 05:33:34,269 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 91 predicate places. [2023-11-29 05:33:34,270 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 152 transitions, 1829 flow [2023-11-29 05:33:34,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:34,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:33:34,270 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:34,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:33:34,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:33:34,476 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:33:34,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:34,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1110413583, now seen corresponding path program 4 times [2023-11-29 05:33:34,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:34,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231799327] [2023-11-29 05:33:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:34,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:34,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:34,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231799327] [2023-11-29 05:33:34,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231799327] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:34,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771768052] [2023-11-29 05:33:34,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:33:34,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:34,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:34,667 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:34,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:33:34,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:33:34,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:33:34,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:33:34,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:34,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:34,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771768052] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:34,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:34,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-29 05:33:34,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749739614] [2023-11-29 05:33:34,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:34,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:33:34,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:34,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:33:34,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:33:34,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:33:34,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 152 transitions, 1829 flow. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:34,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:34,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:33:34,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:33:35,928 INFO L124 PetriNetUnfolderBase]: 1701/2899 cut-off events. [2023-11-29 05:33:35,928 INFO L125 PetriNetUnfolderBase]: For 29748/29766 co-relation queries the response was YES. [2023-11-29 05:33:35,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16945 conditions, 2899 events. 1701/2899 cut-off events. For 29748/29766 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15786 event pairs, 41 based on Foata normal form. 64/2941 useless extension candidates. Maximal degree in co-relation 16500. Up to 907 conditions per place. [2023-11-29 05:33:35,963 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 131 selfloop transitions, 234 changer transitions 3/373 dead transitions. [2023-11-29 05:33:35,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 373 transitions, 4861 flow [2023-11-29 05:33:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 05:33:35,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 05:33:35,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 232 transitions. [2023-11-29 05:33:35,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43856332703213613 [2023-11-29 05:33:35,966 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 232 transitions. [2023-11-29 05:33:35,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 232 transitions. [2023-11-29 05:33:35,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:33:35,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 232 transitions. [2023-11-29 05:33:35,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 10.08695652173913) internal successors, (232), 23 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:35,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 23.0) internal successors, (552), 24 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:35,969 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 23.0) internal successors, (552), 24 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:35,969 INFO L175 Difference]: Start difference. First operand has 116 places, 152 transitions, 1829 flow. Second operand 23 states and 232 transitions. [2023-11-29 05:33:35,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 373 transitions, 4861 flow [2023-11-29 05:33:36,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 373 transitions, 4722 flow, removed 52 selfloop flow, removed 3 redundant places. [2023-11-29 05:33:36,043 INFO L231 Difference]: Finished difference. Result has 144 places, 287 transitions, 4255 flow [2023-11-29 05:33:36,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1754, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4255, PETRI_PLACES=144, PETRI_TRANSITIONS=287} [2023-11-29 05:33:36,044 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 119 predicate places. [2023-11-29 05:33:36,044 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 287 transitions, 4255 flow [2023-11-29 05:33:36,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 12 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:36,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:33:36,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:36,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:33:36,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:36,247 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:33:36,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:36,248 INFO L85 PathProgramCache]: Analyzing trace with hash 624163753, now seen corresponding path program 5 times [2023-11-29 05:33:36,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:36,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628490334] [2023-11-29 05:33:36,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:36,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:36,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:36,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628490334] [2023-11-29 05:33:36,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628490334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:36,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248728537] [2023-11-29 05:33:36,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:33:36,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:36,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:36,426 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:36,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:33:36,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:33:36,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:33:36,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:33:36,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:36,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:36,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:36,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248728537] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:36,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:36,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-29 05:33:36,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729386805] [2023-11-29 05:33:36,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:36,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:33:36,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:36,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:33:36,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:33:36,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:33:36,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 287 transitions, 4255 flow. Second operand has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:36,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:36,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:33:36,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:33:38,939 INFO L124 PetriNetUnfolderBase]: 2398/4153 cut-off events. [2023-11-29 05:33:38,939 INFO L125 PetriNetUnfolderBase]: For 50882/50912 co-relation queries the response was YES. [2023-11-29 05:33:38,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27244 conditions, 4153 events. 2398/4153 cut-off events. For 50882/50912 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24798 event pairs, 104 based on Foata normal form. 144/4265 useless extension candidates. Maximal degree in co-relation 26826. Up to 1247 conditions per place. [2023-11-29 05:33:38,980 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 164 selfloop transitions, 412 changer transitions 7/588 dead transitions. [2023-11-29 05:33:38,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 588 transitions, 9092 flow [2023-11-29 05:33:38,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 05:33:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-29 05:33:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 350 transitions. [2023-11-29 05:33:38,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112808460634548 [2023-11-29 05:33:38,983 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 350 transitions. [2023-11-29 05:33:38,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 350 transitions. [2023-11-29 05:33:38,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:33:38,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 350 transitions. [2023-11-29 05:33:38,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 9.45945945945946) internal successors, (350), 37 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:38,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 23.0) internal successors, (874), 38 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:38,988 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 23.0) internal successors, (874), 38 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:38,988 INFO L175 Difference]: Start difference. First operand has 144 places, 287 transitions, 4255 flow. Second operand 37 states and 350 transitions. [2023-11-29 05:33:38,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 588 transitions, 9092 flow [2023-11-29 05:33:39,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 588 transitions, 7839 flow, removed 547 selfloop flow, removed 3 redundant places. [2023-11-29 05:33:39,205 INFO L231 Difference]: Finished difference. Result has 194 places, 458 transitions, 7345 flow [2023-11-29 05:33:39,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=3737, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7345, PETRI_PLACES=194, PETRI_TRANSITIONS=458} [2023-11-29 05:33:39,205 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 169 predicate places. [2023-11-29 05:33:39,206 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 458 transitions, 7345 flow [2023-11-29 05:33:39,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:39,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:33:39,206 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:39,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:33:39,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:39,407 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:33:39,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:39,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1145130497, now seen corresponding path program 6 times [2023-11-29 05:33:39,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:39,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546402106] [2023-11-29 05:33:39,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:39,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:39,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:39,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546402106] [2023-11-29 05:33:39,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546402106] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:39,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467278143] [2023-11-29 05:33:39,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:33:39,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:39,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:39,555 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:39,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:33:39,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-29 05:33:39,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:33:39,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:33:39,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:39,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:39,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:39,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467278143] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:39,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:39,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-29 05:33:39,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100611608] [2023-11-29 05:33:39,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:39,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:33:39,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:39,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:33:39,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:33:39,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:33:39,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 458 transitions, 7345 flow. Second operand has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:39,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:39,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:33:39,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:33:41,861 INFO L124 PetriNetUnfolderBase]: 3014/5273 cut-off events. [2023-11-29 05:33:41,861 INFO L125 PetriNetUnfolderBase]: For 67136/67170 co-relation queries the response was YES. [2023-11-29 05:33:41,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35381 conditions, 5273 events. 3014/5273 cut-off events. For 67136/67170 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 33204 event pairs, 138 based on Foata normal form. 70/5301 useless extension candidates. Maximal degree in co-relation 34105. Up to 1005 conditions per place. [2023-11-29 05:33:41,912 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 190 selfloop transitions, 509 changer transitions 5/709 dead transitions. [2023-11-29 05:33:41,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 709 transitions, 11947 flow [2023-11-29 05:33:41,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 05:33:41,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-29 05:33:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 333 transitions. [2023-11-29 05:33:41,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43873517786561267 [2023-11-29 05:33:41,914 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 333 transitions. [2023-11-29 05:33:41,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 333 transitions. [2023-11-29 05:33:41,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:33:41,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 333 transitions. [2023-11-29 05:33:41,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 10.090909090909092) internal successors, (333), 33 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:41,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 23.0) internal successors, (782), 34 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:41,918 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 23.0) internal successors, (782), 34 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:41,918 INFO L175 Difference]: Start difference. First operand has 194 places, 458 transitions, 7345 flow. Second operand 33 states and 333 transitions. [2023-11-29 05:33:41,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 709 transitions, 11947 flow [2023-11-29 05:33:42,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 709 transitions, 10926 flow, removed 309 selfloop flow, removed 8 redundant places. [2023-11-29 05:33:42,416 INFO L231 Difference]: Finished difference. Result has 226 places, 596 transitions, 10157 flow [2023-11-29 05:33:42,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6551, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10157, PETRI_PLACES=226, PETRI_TRANSITIONS=596} [2023-11-29 05:33:42,417 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 201 predicate places. [2023-11-29 05:33:42,417 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 596 transitions, 10157 flow [2023-11-29 05:33:42,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:42,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:33:42,417 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:42,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:33:42,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 05:33:42,618 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:33:42,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:42,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1396034703, now seen corresponding path program 7 times [2023-11-29 05:33:42,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:42,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652329706] [2023-11-29 05:33:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:42,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:42,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:42,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652329706] [2023-11-29 05:33:42,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652329706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:42,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772020691] [2023-11-29 05:33:42,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:33:42,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:42,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:42,743 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:42,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:33:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:42,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:33:42,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:42,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:42,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772020691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:42,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:42,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-29 05:33:42,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330562958] [2023-11-29 05:33:42,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:42,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:33:42,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:42,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:33:42,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:33:43,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:33:43,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 596 transitions, 10157 flow. Second operand has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:43,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:43,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:33:43,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:33:45,049 INFO L124 PetriNetUnfolderBase]: 3378/5861 cut-off events. [2023-11-29 05:33:45,050 INFO L125 PetriNetUnfolderBase]: For 82126/82162 co-relation queries the response was YES. [2023-11-29 05:33:45,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41188 conditions, 5861 events. 3378/5861 cut-off events. For 82126/82162 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 36560 event pairs, 281 based on Foata normal form. 40/5869 useless extension candidates. Maximal degree in co-relation 40680. Up to 1339 conditions per place. [2023-11-29 05:33:45,116 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 239 selfloop transitions, 507 changer transitions 3/754 dead transitions. [2023-11-29 05:33:45,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 754 transitions, 13804 flow [2023-11-29 05:33:45,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 05:33:45,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-29 05:33:45,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 252 transitions. [2023-11-29 05:33:45,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4763705103969754 [2023-11-29 05:33:45,118 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 252 transitions. [2023-11-29 05:33:45,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 252 transitions. [2023-11-29 05:33:45,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:33:45,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 252 transitions. [2023-11-29 05:33:45,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 10.956521739130435) internal successors, (252), 23 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:45,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 23.0) internal successors, (552), 24 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:45,120 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 23.0) internal successors, (552), 24 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:45,120 INFO L175 Difference]: Start difference. First operand has 226 places, 596 transitions, 10157 flow. Second operand 23 states and 252 transitions. [2023-11-29 05:33:45,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 754 transitions, 13804 flow [2023-11-29 05:33:45,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 754 transitions, 13526 flow, removed 97 selfloop flow, removed 4 redundant places. [2023-11-29 05:33:45,842 INFO L231 Difference]: Finished difference. Result has 246 places, 661 transitions, 12462 flow [2023-11-29 05:33:45,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=9782, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12462, PETRI_PLACES=246, PETRI_TRANSITIONS=661} [2023-11-29 05:33:45,843 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 221 predicate places. [2023-11-29 05:33:45,843 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 661 transitions, 12462 flow [2023-11-29 05:33:45,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.571428571428571) internal successors, (92), 14 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:45,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:33:45,844 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:45,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:33:46,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 05:33:46,045 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:33:46,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:46,045 INFO L85 PathProgramCache]: Analyzing trace with hash -958695929, now seen corresponding path program 8 times [2023-11-29 05:33:46,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:46,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504264674] [2023-11-29 05:33:46,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:46,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:46,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:46,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504264674] [2023-11-29 05:33:46,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504264674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:46,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931234289] [2023-11-29 05:33:46,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:33:46,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:46,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:46,215 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:46,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:33:46,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:33:46,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:33:46,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:33:46,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:46,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:46,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931234289] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:46,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:46,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-29 05:33:46,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049275190] [2023-11-29 05:33:46,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:46,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 05:33:46,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:46,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 05:33:46,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:33:46,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:33:46,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 661 transitions, 12462 flow. Second operand has 16 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:46,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:46,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:33:46,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:33:49,165 INFO L124 PetriNetUnfolderBase]: 4287/7422 cut-off events. [2023-11-29 05:33:49,165 INFO L125 PetriNetUnfolderBase]: For 123962/124000 co-relation queries the response was YES. [2023-11-29 05:33:49,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55669 conditions, 7422 events. 4287/7422 cut-off events. For 123962/124000 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 48384 event pairs, 312 based on Foata normal form. 86/7448 useless extension candidates. Maximal degree in co-relation 54645. Up to 1363 conditions per place. [2023-11-29 05:33:49,252 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 248 selfloop transitions, 691 changer transitions 9/953 dead transitions. [2023-11-29 05:33:49,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 953 transitions, 19125 flow [2023-11-29 05:33:49,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 05:33:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-29 05:33:49,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 284 transitions. [2023-11-29 05:33:49,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409937888198758 [2023-11-29 05:33:49,255 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 284 transitions. [2023-11-29 05:33:49,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 284 transitions. [2023-11-29 05:33:49,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:33:49,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 284 transitions. [2023-11-29 05:33:49,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 10.142857142857142) internal successors, (284), 28 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:49,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 23.0) internal successors, (667), 29 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:49,259 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 23.0) internal successors, (667), 29 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:49,259 INFO L175 Difference]: Start difference. First operand has 246 places, 661 transitions, 12462 flow. Second operand 28 states and 284 transitions. [2023-11-29 05:33:49,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 953 transitions, 19125 flow [2023-11-29 05:33:50,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 953 transitions, 18606 flow, removed 127 selfloop flow, removed 5 redundant places. [2023-11-29 05:33:50,625 INFO L231 Difference]: Finished difference. Result has 276 places, 866 transitions, 18662 flow [2023-11-29 05:33:50,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=12057, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=506, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=18662, PETRI_PLACES=276, PETRI_TRANSITIONS=866} [2023-11-29 05:33:50,626 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 251 predicate places. [2023-11-29 05:33:50,626 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 866 transitions, 18662 flow [2023-11-29 05:33:50,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:50,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:33:50,627 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:50,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:33:50,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 05:33:50,834 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:33:50,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:50,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1274035931, now seen corresponding path program 9 times [2023-11-29 05:33:50,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:50,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381631400] [2023-11-29 05:33:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:50,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:50,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:50,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381631400] [2023-11-29 05:33:50,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381631400] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:50,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312843342] [2023-11-29 05:33:50,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:33:50,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:50,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:50,993 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:50,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:33:51,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:33:51,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:33:51,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:33:51,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:51,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:51,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312843342] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:51,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:51,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 05:33:51,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674128512] [2023-11-29 05:33:51,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:51,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:33:51,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:51,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:33:51,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:33:51,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:33:51,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 866 transitions, 18662 flow. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:51,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:51,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:33:51,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:33:54,413 INFO L124 PetriNetUnfolderBase]: 4250/7369 cut-off events. [2023-11-29 05:33:54,413 INFO L125 PetriNetUnfolderBase]: For 149972/150010 co-relation queries the response was YES. [2023-11-29 05:33:54,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60470 conditions, 7369 events. 4250/7369 cut-off events. For 149972/150010 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 48309 event pairs, 686 based on Foata normal form. 42/7339 useless extension candidates. Maximal degree in co-relation 59489. Up to 3178 conditions per place. [2023-11-29 05:33:54,494 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 400 selfloop transitions, 501 changer transitions 3/909 dead transitions. [2023-11-29 05:33:54,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 909 transitions, 20783 flow [2023-11-29 05:33:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:33:54,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 05:33:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 149 transitions. [2023-11-29 05:33:54,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46273291925465837 [2023-11-29 05:33:54,496 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 149 transitions. [2023-11-29 05:33:54,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 149 transitions. [2023-11-29 05:33:54,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:33:54,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 149 transitions. [2023-11-29 05:33:54,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:54,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:54,498 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:54,498 INFO L175 Difference]: Start difference. First operand has 276 places, 866 transitions, 18662 flow. Second operand 14 states and 149 transitions. [2023-11-29 05:33:54,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 909 transitions, 20783 flow [2023-11-29 05:33:56,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 909 transitions, 19974 flow, removed 202 selfloop flow, removed 9 redundant places. [2023-11-29 05:33:56,531 INFO L231 Difference]: Finished difference. Result has 281 places, 866 transitions, 18878 flow [2023-11-29 05:33:56,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=17816, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=498, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=18878, PETRI_PLACES=281, PETRI_TRANSITIONS=866} [2023-11-29 05:33:56,533 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 256 predicate places. [2023-11-29 05:33:56,533 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 866 transitions, 18878 flow [2023-11-29 05:33:56,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:56,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:33:56,533 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:56,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 05:33:56,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:33:56,734 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:33:56,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:56,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1192446287, now seen corresponding path program 10 times [2023-11-29 05:33:56,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:56,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584341325] [2023-11-29 05:33:56,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:56,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:56,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:56,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584341325] [2023-11-29 05:33:56,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584341325] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:56,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144640458] [2023-11-29 05:33:56,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:33:56,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:56,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:56,857 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:56,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:33:56,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:33:56,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:33:56,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:33:56,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:57,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:57,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144640458] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:57,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:57,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 05:33:57,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359206645] [2023-11-29 05:33:57,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:57,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:33:57,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:57,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:33:57,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:33:57,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:33:57,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 866 transitions, 18878 flow. Second operand has 15 states, 15 states have (on average 6.8) internal successors, (102), 15 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:57,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:57,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:33:57,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:34:01,543 INFO L124 PetriNetUnfolderBase]: 5178/9095 cut-off events. [2023-11-29 05:34:01,543 INFO L125 PetriNetUnfolderBase]: For 185077/185119 co-relation queries the response was YES. [2023-11-29 05:34:01,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74033 conditions, 9095 events. 5178/9095 cut-off events. For 185077/185119 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 62669 event pairs, 401 based on Foata normal form. 134/9133 useless extension candidates. Maximal degree in co-relation 72934. Up to 1987 conditions per place. [2023-11-29 05:34:01,678 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 404 selfloop transitions, 843 changer transitions 1/1253 dead transitions. [2023-11-29 05:34:01,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 1253 transitions, 28090 flow [2023-11-29 05:34:01,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-29 05:34:01,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-11-29 05:34:01,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 431 transitions. [2023-11-29 05:34:01,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435793731041456 [2023-11-29 05:34:01,682 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 431 transitions. [2023-11-29 05:34:01,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 431 transitions. [2023-11-29 05:34:01,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:34:01,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 431 transitions. [2023-11-29 05:34:01,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 10.023255813953488) internal successors, (431), 43 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:01,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 23.0) internal successors, (1012), 44 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:01,687 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 23.0) internal successors, (1012), 44 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:01,687 INFO L175 Difference]: Start difference. First operand has 281 places, 866 transitions, 18878 flow. Second operand 43 states and 431 transitions. [2023-11-29 05:34:01,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 1253 transitions, 28090 flow [2023-11-29 05:34:04,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1253 transitions, 27164 flow, removed 14 selfloop flow, removed 11 redundant places. [2023-11-29 05:34:04,345 INFO L231 Difference]: Finished difference. Result has 327 places, 1092 transitions, 26433 flow [2023-11-29 05:34:04,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=18085, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=627, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=26433, PETRI_PLACES=327, PETRI_TRANSITIONS=1092} [2023-11-29 05:34:04,346 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 302 predicate places. [2023-11-29 05:34:04,346 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 1092 transitions, 26433 flow [2023-11-29 05:34:04,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.8) internal successors, (102), 15 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:04,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:34:04,347 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:34:04,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:34:04,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:34:04,547 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:34:04,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:34:04,548 INFO L85 PathProgramCache]: Analyzing trace with hash -587321193, now seen corresponding path program 11 times [2023-11-29 05:34:04,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:34:04,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087925566] [2023-11-29 05:34:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:04,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:34:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:34:04,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:34:04,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087925566] [2023-11-29 05:34:04,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087925566] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:34:04,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97398033] [2023-11-29 05:34:04,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:34:04,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:34:04,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:34:04,715 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:34:04,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:34:04,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:34:04,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:34:04,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:34:04,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:34:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:34:04,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:34:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:34:04,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97398033] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:34:04,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:34:04,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-29 05:34:04,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184501106] [2023-11-29 05:34:04,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:34:04,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 05:34:04,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:34:04,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 05:34:04,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:34:04,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:34:04,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 1092 transitions, 26433 flow. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:04,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:34:04,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:34:04,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:34:09,578 INFO L124 PetriNetUnfolderBase]: 5240/9225 cut-off events. [2023-11-29 05:34:09,578 INFO L125 PetriNetUnfolderBase]: For 225539/225581 co-relation queries the response was YES. [2023-11-29 05:34:09,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81229 conditions, 9225 events. 5240/9225 cut-off events. For 225539/225581 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 63924 event pairs, 1848 based on Foata normal form. 52/9188 useless extension candidates. Maximal degree in co-relation 80010. Up to 7128 conditions per place. [2023-11-29 05:34:09,712 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 983 selfloop transitions, 177 changer transitions 4/1169 dead transitions. [2023-11-29 05:34:09,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1169 transitions, 30039 flow [2023-11-29 05:34:09,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 05:34:09,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 05:34:09,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 116 transitions. [2023-11-29 05:34:09,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42028985507246375 [2023-11-29 05:34:09,713 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 116 transitions. [2023-11-29 05:34:09,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 116 transitions. [2023-11-29 05:34:09,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:34:09,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 116 transitions. [2023-11-29 05:34:09,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 9.666666666666666) internal successors, (116), 12 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:09,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 23.0) internal successors, (299), 13 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:09,716 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 23.0) internal successors, (299), 13 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:09,716 INFO L175 Difference]: Start difference. First operand has 327 places, 1092 transitions, 26433 flow. Second operand 12 states and 116 transitions. [2023-11-29 05:34:09,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1169 transitions, 30039 flow [2023-11-29 05:34:13,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1169 transitions, 29686 flow, removed 58 selfloop flow, removed 11 redundant places. [2023-11-29 05:34:13,616 INFO L231 Difference]: Finished difference. Result has 333 places, 1118 transitions, 27319 flow [2023-11-29 05:34:13,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=26088, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1092, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=925, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=27319, PETRI_PLACES=333, PETRI_TRANSITIONS=1118} [2023-11-29 05:34:13,618 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 308 predicate places. [2023-11-29 05:34:13,618 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 1118 transitions, 27319 flow [2023-11-29 05:34:13,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:13,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:34:13,618 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:34:13,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:34:13,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:34:13,819 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:34:13,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:34:13,819 INFO L85 PathProgramCache]: Analyzing trace with hash -748546601, now seen corresponding path program 12 times [2023-11-29 05:34:13,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:34:13,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967642240] [2023-11-29 05:34:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:13,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:34:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:34:13,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:34:13,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967642240] [2023-11-29 05:34:13,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967642240] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:34:13,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613269804] [2023-11-29 05:34:13,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:34:13,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:34:13,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:34:14,000 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:34:14,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:34:14,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-29 05:34:14,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:34:14,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:34:14,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:34:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:34:14,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:34:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:34:14,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613269804] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:34:14,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:34:14,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 05:34:14,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469204327] [2023-11-29 05:34:14,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:34:14,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:34:14,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:34:14,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:34:14,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:34:14,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:34:14,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 1118 transitions, 27319 flow. Second operand has 15 states, 15 states have (on average 7.0) internal successors, (105), 15 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:14,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:34:14,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:34:14,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:34:21,159 INFO L124 PetriNetUnfolderBase]: 7007/12390 cut-off events. [2023-11-29 05:34:21,159 INFO L125 PetriNetUnfolderBase]: For 318357/318407 co-relation queries the response was YES. [2023-11-29 05:34:21,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109772 conditions, 12390 events. 7007/12390 cut-off events. For 318357/318407 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 90011 event pairs, 1025 based on Foata normal form. 182/12481 useless extension candidates. Maximal degree in co-relation 108648. Up to 4001 conditions per place. [2023-11-29 05:34:21,525 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 894 selfloop transitions, 782 changer transitions 2/1683 dead transitions. [2023-11-29 05:34:21,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1683 transitions, 42661 flow [2023-11-29 05:34:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 05:34:21,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-29 05:34:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 383 transitions. [2023-11-29 05:34:21,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46256038647342995 [2023-11-29 05:34:21,529 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 383 transitions. [2023-11-29 05:34:21,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 383 transitions. [2023-11-29 05:34:21,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:34:21,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 383 transitions. [2023-11-29 05:34:21,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 10.63888888888889) internal successors, (383), 36 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:21,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 23.0) internal successors, (851), 37 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:21,534 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 23.0) internal successors, (851), 37 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:21,534 INFO L175 Difference]: Start difference. First operand has 333 places, 1118 transitions, 27319 flow. Second operand 36 states and 383 transitions. [2023-11-29 05:34:21,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1683 transitions, 42661 flow [2023-11-29 05:34:28,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1683 transitions, 42460 flow, removed 74 selfloop flow, removed 8 redundant places. [2023-11-29 05:34:28,047 INFO L231 Difference]: Finished difference. Result has 379 places, 1433 transitions, 38330 flow [2023-11-29 05:34:28,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=27044, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=38330, PETRI_PLACES=379, PETRI_TRANSITIONS=1433} [2023-11-29 05:34:28,049 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 354 predicate places. [2023-11-29 05:34:28,049 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 1433 transitions, 38330 flow [2023-11-29 05:34:28,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.0) internal successors, (105), 15 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:28,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:34:28,049 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:34:28,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:34:28,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:34:28,250 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:34:28,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:34:28,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1189245569, now seen corresponding path program 13 times [2023-11-29 05:34:28,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:34:28,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423733790] [2023-11-29 05:34:28,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:28,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:34:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:34:28,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:34:28,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423733790] [2023-11-29 05:34:28,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423733790] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:34:28,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169377932] [2023-11-29 05:34:28,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:34:28,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:34:28,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:34:28,378 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:34:28,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:34:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:28,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:34:28,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:34:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:34:28,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:34:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:34:28,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169377932] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:34:28,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:34:28,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 05:34:28,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631134307] [2023-11-29 05:34:28,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:34:28,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:34:28,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:34:28,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:34:28,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:34:28,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:34:28,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1433 transitions, 38330 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:28,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:34:28,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:34:28,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:34:38,429 INFO L124 PetriNetUnfolderBase]: 8827/15362 cut-off events. [2023-11-29 05:34:38,429 INFO L125 PetriNetUnfolderBase]: For 483729/483793 co-relation queries the response was YES. [2023-11-29 05:34:38,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147213 conditions, 15362 events. 8827/15362 cut-off events. For 483729/483793 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 113411 event pairs, 2164 based on Foata normal form. 78/15305 useless extension candidates. Maximal degree in co-relation 145822. Up to 9132 conditions per place. [2023-11-29 05:34:38,719 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 1071 selfloop transitions, 833 changer transitions 0/1909 dead transitions. [2023-11-29 05:34:38,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 1909 transitions, 54151 flow [2023-11-29 05:34:38,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 05:34:38,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-29 05:34:38,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 209 transitions. [2023-11-29 05:34:38,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543478260869565 [2023-11-29 05:34:38,721 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 209 transitions. [2023-11-29 05:34:38,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 209 transitions. [2023-11-29 05:34:38,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:34:38,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 209 transitions. [2023-11-29 05:34:38,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 10.45) internal successors, (209), 20 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:38,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 23.0) internal successors, (483), 21 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:38,723 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 23.0) internal successors, (483), 21 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:38,723 INFO L175 Difference]: Start difference. First operand has 379 places, 1433 transitions, 38330 flow. Second operand 20 states and 209 transitions. [2023-11-29 05:34:38,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 1909 transitions, 54151 flow [2023-11-29 05:34:49,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1909 transitions, 53292 flow, removed 357 selfloop flow, removed 5 redundant places. [2023-11-29 05:34:49,646 INFO L231 Difference]: Finished difference. Result has 401 places, 1815 transitions, 51145 flow [2023-11-29 05:34:49,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=37679, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=800, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=51145, PETRI_PLACES=401, PETRI_TRANSITIONS=1815} [2023-11-29 05:34:49,649 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 376 predicate places. [2023-11-29 05:34:49,649 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 1815 transitions, 51145 flow [2023-11-29 05:34:49,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:49,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:34:49,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:34:49,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:34:49,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:34:49,850 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:34:49,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:34:49,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1996249437, now seen corresponding path program 14 times [2023-11-29 05:34:49,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:34:49,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117726863] [2023-11-29 05:34:49,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:34:49,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:34:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:34:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:34:49,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:34:49,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117726863] [2023-11-29 05:34:49,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117726863] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:34:49,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434976592] [2023-11-29 05:34:49,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:34:49,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:34:49,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:34:49,997 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:34:50,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:34:50,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:34:50,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:34:50,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:34:50,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:34:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:34:50,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:34:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:34:50,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434976592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:34:50,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:34:50,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-29 05:34:50,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372389023] [2023-11-29 05:34:50,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:34:50,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 05:34:50,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:34:50,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 05:34:50,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:34:50,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:34:50,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 1815 transitions, 51145 flow. Second operand has 16 states, 16 states have (on average 6.8125) internal successors, (109), 16 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:34:50,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:34:50,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:34:50,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:35:04,302 INFO L124 PetriNetUnfolderBase]: 9581/16698 cut-off events. [2023-11-29 05:35:04,302 INFO L125 PetriNetUnfolderBase]: For 562554/562624 co-relation queries the response was YES. [2023-11-29 05:35:04,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166373 conditions, 16698 events. 9581/16698 cut-off events. For 562554/562624 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 125515 event pairs, 1215 based on Foata normal form. 116/16659 useless extension candidates. Maximal degree in co-relation 164976. Up to 5886 conditions per place. [2023-11-29 05:35:04,662 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 866 selfloop transitions, 1169 changer transitions 8/2048 dead transitions. [2023-11-29 05:35:04,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 2048 transitions, 60565 flow [2023-11-29 05:35:04,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 05:35:04,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 05:35:04,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 216 transitions. [2023-11-29 05:35:04,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4472049689440994 [2023-11-29 05:35:04,663 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 216 transitions. [2023-11-29 05:35:04,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 216 transitions. [2023-11-29 05:35:04,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:35:04,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 216 transitions. [2023-11-29 05:35:04,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 10.285714285714286) internal successors, (216), 21 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:35:04,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 23.0) internal successors, (506), 22 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:35:04,665 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 23.0) internal successors, (506), 22 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:35:04,665 INFO L175 Difference]: Start difference. First operand has 401 places, 1815 transitions, 51145 flow. Second operand 21 states and 216 transitions. [2023-11-29 05:35:04,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 2048 transitions, 60565 flow [2023-11-29 05:35:18,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 2048 transitions, 59936 flow, removed 204 selfloop flow, removed 5 redundant places. [2023-11-29 05:35:18,274 INFO L231 Difference]: Finished difference. Result has 424 places, 1974 transitions, 59094 flow [2023-11-29 05:35:18,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=50489, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1811, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=59094, PETRI_PLACES=424, PETRI_TRANSITIONS=1974} [2023-11-29 05:35:18,276 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 399 predicate places. [2023-11-29 05:35:18,276 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 1974 transitions, 59094 flow [2023-11-29 05:35:18,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.8125) internal successors, (109), 16 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:35:18,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:35:18,276 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:35:18,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:35:18,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:35:18,477 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:35:18,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:35:18,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1688524815, now seen corresponding path program 15 times [2023-11-29 05:35:18,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:35:18,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393025978] [2023-11-29 05:35:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:35:18,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:35:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:35:18,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:35:18,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393025978] [2023-11-29 05:35:18,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393025978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:35:18,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893400743] [2023-11-29 05:35:18,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:35:18,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:35:18,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:35:18,617 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:35:18,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:35:18,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 05:35:18,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:35:18,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:35:18,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:35:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:35:18,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:35:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:35:18,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893400743] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:35:18,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:35:18,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-29 05:35:18,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109216785] [2023-11-29 05:35:18,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:35:18,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:35:18,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:35:18,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:35:18,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:35:18,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:35:18,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 1974 transitions, 59094 flow. Second operand has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:35:18,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:35:18,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:35:18,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:35:34,021 INFO L124 PetriNetUnfolderBase]: 9560/16679 cut-off events. [2023-11-29 05:35:34,021 INFO L125 PetriNetUnfolderBase]: For 632640/632708 co-relation queries the response was YES. [2023-11-29 05:35:34,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174383 conditions, 16679 events. 9560/16679 cut-off events. For 632640/632708 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 125903 event pairs, 2720 based on Foata normal form. 78/16598 useless extension candidates. Maximal degree in co-relation 172954. Up to 11342 conditions per place. [2023-11-29 05:35:34,382 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 1402 selfloop transitions, 611 changer transitions 3/2021 dead transitions. [2023-11-29 05:35:34,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 2021 transitions, 63709 flow [2023-11-29 05:35:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:35:34,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 05:35:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 142 transitions. [2023-11-29 05:35:34,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409937888198758 [2023-11-29 05:35:34,383 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 142 transitions. [2023-11-29 05:35:34,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 142 transitions. [2023-11-29 05:35:34,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:35:34,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 142 transitions. [2023-11-29 05:35:34,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 10.142857142857142) internal successors, (142), 14 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:35:34,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:35:34,385 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 23.0) internal successors, (345), 15 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:35:34,385 INFO L175 Difference]: Start difference. First operand has 424 places, 1974 transitions, 59094 flow. Second operand 14 states and 142 transitions. [2023-11-29 05:35:34,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 2021 transitions, 63709 flow [2023-11-29 05:35:49,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 2021 transitions, 63191 flow, removed 127 selfloop flow, removed 8 redundant places. [2023-11-29 05:35:49,307 INFO L231 Difference]: Finished difference. Result has 431 places, 1975 transitions, 59846 flow [2023-11-29 05:35:49,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=58523, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=607, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=59846, PETRI_PLACES=431, PETRI_TRANSITIONS=1975} [2023-11-29 05:35:49,309 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 406 predicate places. [2023-11-29 05:35:49,309 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 1975 transitions, 59846 flow [2023-11-29 05:35:49,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 14 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:35:49,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:35:49,309 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:35:49,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 05:35:49,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 05:35:49,510 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:35:49,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:35:49,510 INFO L85 PathProgramCache]: Analyzing trace with hash -716826493, now seen corresponding path program 16 times [2023-11-29 05:35:49,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:35:49,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046428856] [2023-11-29 05:35:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:35:49,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:35:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:35:49,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:35:49,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:35:49,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046428856] [2023-11-29 05:35:49,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046428856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:35:49,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738967629] [2023-11-29 05:35:49,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:35:49,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:35:49,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:35:49,646 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:35:49,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:35:49,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:35:49,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:35:49,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:35:49,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:35:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:35:49,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:35:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:35:49,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738967629] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:35:49,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:35:49,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-29 05:35:49,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375346135] [2023-11-29 05:35:49,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:35:49,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:35:49,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:35:49,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:35:49,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:35:49,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:35:49,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 1975 transitions, 59846 flow. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:35:49,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:35:49,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:35:49,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:36:09,801 INFO L124 PetriNetUnfolderBase]: 12943/22552 cut-off events. [2023-11-29 05:36:09,802 INFO L125 PetriNetUnfolderBase]: For 885904/886012 co-relation queries the response was YES. [2023-11-29 05:36:10,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237906 conditions, 22552 events. 12943/22552 cut-off events. For 885904/886012 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 176532 event pairs, 1065 based on Foata normal form. 260/22591 useless extension candidates. Maximal degree in co-relation 237160. Up to 4986 conditions per place. [2023-11-29 05:36:10,370 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 719 selfloop transitions, 2013 changer transitions 6/2743 dead transitions. [2023-11-29 05:36:10,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 2743 transitions, 87640 flow [2023-11-29 05:36:10,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 05:36:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-29 05:36:10,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 349 transitions. [2023-11-29 05:36:10,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4462915601023018 [2023-11-29 05:36:10,372 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 349 transitions. [2023-11-29 05:36:10,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 349 transitions. [2023-11-29 05:36:10,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:36:10,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 349 transitions. [2023-11-29 05:36:10,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 10.264705882352942) internal successors, (349), 34 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:10,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 23.0) internal successors, (805), 35 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:10,375 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 23.0) internal successors, (805), 35 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:10,375 INFO L175 Difference]: Start difference. First operand has 431 places, 1975 transitions, 59846 flow. Second operand 34 states and 349 transitions. [2023-11-29 05:36:10,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 2743 transitions, 87640 flow [2023-11-29 05:36:34,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 2743 transitions, 86088 flow, removed 21 selfloop flow, removed 15 redundant places. [2023-11-29 05:36:35,052 INFO L231 Difference]: Finished difference. Result has 459 places, 2610 transitions, 85741 flow [2023-11-29 05:36:35,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=58266, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1962, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=85741, PETRI_PLACES=459, PETRI_TRANSITIONS=2610} [2023-11-29 05:36:35,054 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 434 predicate places. [2023-11-29 05:36:35,054 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 2610 transitions, 85741 flow [2023-11-29 05:36:35,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 15 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:35,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:36:35,055 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:36:35,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 05:36:35,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 05:36:35,255 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:36:35,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:36:35,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1492808526, now seen corresponding path program 17 times [2023-11-29 05:36:35,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:36:35,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234912272] [2023-11-29 05:36:35,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:36:35,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:36:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:36:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:36:35,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:36:35,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234912272] [2023-11-29 05:36:35,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234912272] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:36:35,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178222200] [2023-11-29 05:36:35,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 05:36:35,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:36:35,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:36:35,361 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:36:35,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:36:35,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-29 05:36:35,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:36:35,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:36:35,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:36:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:36:35,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:36:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 05:36:35,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178222200] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:36:35,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:36:35,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-11-29 05:36:35,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778580407] [2023-11-29 05:36:35,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:36:35,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:36:35,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:36:35,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:36:35,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:36:35,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2023-11-29 05:36:35,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 2610 transitions, 85741 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:36:35,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:36:35,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2023-11-29 05:36:35,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:37:16,942 INFO L124 PetriNetUnfolderBase]: 20996/37092 cut-off events. [2023-11-29 05:37:16,942 INFO L125 PetriNetUnfolderBase]: For 1972850/1975597 co-relation queries the response was YES. [2023-11-29 05:37:17,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423263 conditions, 37092 events. 20996/37092 cut-off events. For 1972850/1975597 co-relation queries the response was YES. Maximal size of possible extension queue 1408. Compared 323410 event pairs, 1652 based on Foata normal form. 1641/38522 useless extension candidates. Maximal degree in co-relation 422502. Up to 11644 conditions per place. [2023-11-29 05:37:17,979 INFO L140 encePairwiseOnDemand]: 19/23 looper letters, 3870 selfloop transitions, 10 changer transitions 269/4994 dead transitions. [2023-11-29 05:37:17,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 4994 transitions, 173545 flow [2023-11-29 05:37:17,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:37:17,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:37:17,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2023-11-29 05:37:17,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7304347826086957 [2023-11-29 05:37:17,981 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 84 transitions. [2023-11-29 05:37:17,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 84 transitions. [2023-11-29 05:37:17,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:37:17,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 84 transitions. [2023-11-29 05:37:17,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:17,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:17,982 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:37:17,982 INFO L175 Difference]: Start difference. First operand has 459 places, 2610 transitions, 85741 flow. Second operand 5 states and 84 transitions. [2023-11-29 05:37:17,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 4994 transitions, 173545 flow [2023-11-29 05:38:34,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 4994 transitions, 171772 flow, removed 756 selfloop flow, removed 8 redundant places. [2023-11-29 05:38:34,584 INFO L231 Difference]: Finished difference. Result has 455 places, 2536 transitions, 83021 flow [2023-11-29 05:38:34,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=84593, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=83021, PETRI_PLACES=455, PETRI_TRANSITIONS=2536} [2023-11-29 05:38:34,587 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 430 predicate places. [2023-11-29 05:38:34,587 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 2536 transitions, 83021 flow [2023-11-29 05:38:34,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:34,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:38:34,587 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:38:34,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 05:38:34,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 05:38:34,788 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:38:34,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:38:34,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1033203116, now seen corresponding path program 18 times [2023-11-29 05:38:34,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:38:34,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041668292] [2023-11-29 05:38:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:38:34,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:38:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:38:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:34,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:38:34,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041668292] [2023-11-29 05:38:34,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041668292] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:38:34,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346933613] [2023-11-29 05:38:34,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 05:38:34,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:38:34,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:38:34,964 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:38:34,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:38:35,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-29 05:38:35,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:38:35,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:38:35,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:38:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:35,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:38:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:38:35,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346933613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:38:35,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:38:35,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2023-11-29 05:38:35,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281479024] [2023-11-29 05:38:35,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:38:35,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:38:35,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:38:35,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:38:35,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:38:35,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:38:35,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 2536 transitions, 83021 flow. Second operand has 18 states, 18 states have (on average 6.777777777777778) internal successors, (122), 18 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:38:35,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:38:35,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:38:35,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:39:35,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 05:39:40,290 INFO L124 PetriNetUnfolderBase]: 28719/49656 cut-off events. [2023-11-29 05:39:40,290 INFO L125 PetriNetUnfolderBase]: For 2299918/2300746 co-relation queries the response was YES. [2023-11-29 05:39:41,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 573986 conditions, 49656 events. 28719/49656 cut-off events. For 2299918/2300746 co-relation queries the response was YES. Maximal size of possible extension queue 1723. Compared 432642 event pairs, 3889 based on Foata normal form. 654/50230 useless extension candidates. Maximal degree in co-relation 573420. Up to 22448 conditions per place. [2023-11-29 05:39:41,723 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 2303 selfloop transitions, 1954 changer transitions 23/4288 dead transitions. [2023-11-29 05:39:41,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 4288 transitions, 145731 flow [2023-11-29 05:39:41,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-29 05:39:41,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-11-29 05:39:41,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 705 transitions. [2023-11-29 05:39:41,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45749513303049966 [2023-11-29 05:39:41,725 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 705 transitions. [2023-11-29 05:39:41,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 705 transitions. [2023-11-29 05:39:41,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:39:41,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 705 transitions. [2023-11-29 05:39:41,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 10.522388059701493) internal successors, (705), 67 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:41,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 23.0) internal successors, (1564), 68 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:41,729 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 23.0) internal successors, (1564), 68 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:39:41,730 INFO L175 Difference]: Start difference. First operand has 455 places, 2536 transitions, 83021 flow. Second operand 67 states and 705 transitions. [2023-11-29 05:39:41,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 4288 transitions, 145731 flow [2023-11-29 05:41:34,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 4288 transitions, 143551 flow, removed 183 selfloop flow, removed 4 redundant places. [2023-11-29 05:41:34,823 INFO L231 Difference]: Finished difference. Result has 554 places, 3412 transitions, 120793 flow [2023-11-29 05:41:34,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=81872, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=120793, PETRI_PLACES=554, PETRI_TRANSITIONS=3412} [2023-11-29 05:41:34,825 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 529 predicate places. [2023-11-29 05:41:34,826 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 3412 transitions, 120793 flow [2023-11-29 05:41:34,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.777777777777778) internal successors, (122), 18 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:34,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:41:34,826 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:41:34,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 05:41:35,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 05:41:35,027 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:41:35,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:41:35,027 INFO L85 PathProgramCache]: Analyzing trace with hash -645414134, now seen corresponding path program 19 times [2023-11-29 05:41:35,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:41:35,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525017246] [2023-11-29 05:41:35,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:41:35,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:41:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:35,268 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:35,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:41:35,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525017246] [2023-11-29 05:41:35,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525017246] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:41:35,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528812774] [2023-11-29 05:41:35,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 05:41:35,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:41:35,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:41:35,269 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:41:35,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 05:41:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:41:35,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:41:35,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:41:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:35,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:41:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:41:35,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528812774] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:41:35,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:41:35,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-11-29 05:41:35,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637166053] [2023-11-29 05:41:35,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:41:35,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:41:35,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:41:35,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:41:35,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:41:35,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:41:35,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 3412 transitions, 120793 flow. Second operand has 21 states, 21 states have (on average 6.380952380952381) internal successors, (134), 21 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:41:35,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:41:35,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:41:35,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:43:05,177 INFO L124 PetriNetUnfolderBase]: 32932/56875 cut-off events. [2023-11-29 05:43:05,177 INFO L125 PetriNetUnfolderBase]: For 3139564/3139908 co-relation queries the response was YES. [2023-11-29 05:43:06,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675594 conditions, 56875 events. 32932/56875 cut-off events. For 3139564/3139908 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 506669 event pairs, 8863 based on Foata normal form. 376/57055 useless extension candidates. Maximal degree in co-relation 674954. Up to 40771 conditions per place. [2023-11-29 05:43:07,137 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 3736 selfloop transitions, 951 changer transitions 97/4792 dead transitions. [2023-11-29 05:43:07,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 4792 transitions, 174958 flow [2023-11-29 05:43:07,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 05:43:07,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-29 05:43:07,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 331 transitions. [2023-11-29 05:43:07,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44972826086956524 [2023-11-29 05:43:07,139 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 331 transitions. [2023-11-29 05:43:07,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 331 transitions. [2023-11-29 05:43:07,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:43:07,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 331 transitions. [2023-11-29 05:43:07,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 10.34375) internal successors, (331), 32 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:43:07,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 23.0) internal successors, (759), 33 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:43:07,141 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 23.0) internal successors, (759), 33 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:43:07,141 INFO L175 Difference]: Start difference. First operand has 554 places, 3412 transitions, 120793 flow. Second operand 32 states and 331 transitions. [2023-11-29 05:43:07,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 4792 transitions, 174958 flow [2023-11-29 05:45:40,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 4792 transitions, 173846 flow, removed 420 selfloop flow, removed 9 redundant places. [2023-11-29 05:45:40,658 INFO L231 Difference]: Finished difference. Result has 589 places, 4122 transitions, 149050 flow [2023-11-29 05:45:40,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=119822, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=149050, PETRI_PLACES=589, PETRI_TRANSITIONS=4122} [2023-11-29 05:45:40,661 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 564 predicate places. [2023-11-29 05:45:40,661 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 4122 transitions, 149050 flow [2023-11-29 05:45:40,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.380952380952381) internal successors, (134), 21 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:40,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:45:40,661 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:45:40,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 05:45:40,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:45:40,861 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 05:45:40,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:45:40,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1877150038, now seen corresponding path program 20 times [2023-11-29 05:45:40,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:45:40,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970344257] [2023-11-29 05:45:40,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:45:40,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:45:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:45:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:45:41,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:45:41,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970344257] [2023-11-29 05:45:41,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970344257] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:45:41,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111074001] [2023-11-29 05:45:41,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:45:41,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:45:41,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:45:41,027 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:45:41,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_edbe9750-a500-41f6-839c-b5d28826ec65/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 05:45:41,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:45:41,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:45:41,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:45:41,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:45:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:45:41,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:45:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:45:41,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111074001] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:45:41,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:45:41,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 16 [2023-11-29 05:45:41,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244077010] [2023-11-29 05:45:41,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:45:41,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 05:45:41,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:45:41,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 05:45:41,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:45:41,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 23 [2023-11-29 05:45:41,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 4122 transitions, 149050 flow. Second operand has 16 states, 16 states have (on average 6.75) internal successors, (108), 16 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:45:41,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:45:41,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 23 [2023-11-29 05:45:41,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand